Detroit LionsFormer O-Linemanat Center of Murder-for-Hire Case

3/7/2014 12:33 PM PST

Cops are investigating text messages in a murder-for-hire case in which a skin specialist to the stars bragged about soliciting former Detroit Lions offensive lineman Chris Geile to kill a rival skin specialist ... TMZ Sports has learned.

Our sources tell us ... the text messages in question were allegedly sent from Dawn to a friend -- and in them, she brags that Chris will "take out" her intended target. She also mentions that Chris is 6'7" and 315 lbs. She also claims he was a QB ... but that just ain't true.